The shell command
"/lrn-mdl-prod/build/75217/filter/tex/mimetex.linux" -e "/lrn-mdl-prod/moodledata/filter/tex/64fffcf5b6cc49b2d631edaf4ecae98e.gif" -- '\Large W_{fh}'
returned status = 1
Image not found!
Please try the debugging script